Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSBUICK1995LESABRE V6-3.8L VIN KREPAIR AND DIAGNOSISRELAYS AND MODULESRELAYS AND MODULES - POWERTRAIN MANAGEMENTRELAYS AND MODULES - COMPUTERS AND CONTROL SYSTEMSENGINE CONTROL MODULEDIAGRAMSCONNECTOR VIEWSPCM CONNECTOR A-B (RED)
1995 Buick LeSabre V6-3.8L VIN K
PCM Connector A-B (Red)
1995 Buick LeSabre V6-3.8L VIN KSECTION PCM Connector A-B (Red)
POWERTRAIN CONTROL MODULE (PCM) VOLTAGE CHART
This PCM voltage chart is for use with a digital voltmeter to further aid in diagnosis. The voltages you get may vary due to low battery charge or other reasons, but they should be very close. The B+ symbol indicates a nominal system voltage of 12-14 volts.
CONDITIONS FOR TESTING
^ Engine at operating temperature (upper radiator hose hot).
^ Engine idling in "Closed Loop" (for "Engine Run" column) in park or neutral.
^ Test terminal not grounded.
^ Scan tool not installed.
^ Accessories "OFF."
NOTE: Before checking voltages, be sure PCM and engine grounds are clean and tight.
POWERTRAIN CONTROL MODULE (PCM) VOLTAGE CHART
This PCM voltage chart is for use with a digital voltmeter to further aid in diagnosis. The voltages you get may vary due to low battery charge or other reasons, but they should be very close. The B+ symbol indicates a nominal system voltage of 12-14 volts.
CONDITIONS FOR TESTING
^ Engine at operating temperature (upper radiator hose hot).
^ Engine idling in "Closed Loop" (for "Engine Run" column) in park or neutral.
^ Test terminal not grounded.
^ Scan tool not installed.
^ Accessories "OFF."
NOTE: Before checking voltages, be sure PCM and engine grounds are clean and tight.
CHART LEGEND
(1) B+ for first two seconds.
(2) Varies.
* Less than 0.5 volts (500 mV).
** If equipped.
NOTICE: Before "Closed Loop" operation can occur the following must take place:
^ Engine coolant temperature above 29°C (84°F).
^ Heated Oxygen Sensor (HO2S) voltage varying.
^ Engine RPM greater than 800 for 15 consecutive seconds after 1 and 2 have occurred.
RED 32 PIN CONNECTOR
This PCM voltage chart is for use with a digital voltmeter to further aid in diagnosis. The voltages you get may vary due to low battery charge or other reasons, but they should be very close. The B+ symbol indicates a nominal system voltage of 12-14 volts.
CONDITIONS FOR TESTING
^ Engine at operating temperature (upper radiator hose hot).
^ Engine idling in "Closed Loop" (for "Engine Run" column) in park or neutral.
^ Test terminal not grounded.
^ Scan tool not installed.
^ Accessories "OFF."
NOTE: Before checking voltages, be sure PCM and engine grounds are clean and tight.
POWERTRAIN CONTROL MODULE (PCM) VOLTAGE CHART
This PCM voltage chart is for use with a digital voltmeter to further aid in diagnosis. The voltages you get may vary due to low battery charge or other reasons, but they should be very close. The B+ symbol indicates a nominal system voltage of 12-14 volts.
CONDITIONS FOR TESTING
^ Engine at operating temperature (upper radiator hose hot).
^ Engine idling in "Closed Loop" (for "Engine Run" column) in park or neutral.
^ Test terminal not grounded.
^ Scan tool not installed.
^ Accessories "OFF."
NOTE: Before checking voltages, be sure PCM and engine grounds are clean and tight.
CHART LEGEND
(1) B+ for first two seconds.
(2) Varies.
* Less than 0.5 volts (500 mV).
** If equipped.
NOTICE: Before "Closed Loop" operation can occur the following must take place:
^ Engine coolant temperature above 29°C (84°F).
^ Heated Oxygen Sensor (HO2S) voltage varying.
^ Engine RPM greater than 800 for 15 consecutive seconds after 1 and 2 have occurred.
RED 32 PIN CONNECTOR
32 Pin A-B Connector (RED):
RED 32 Pin A-B Connector # 1:
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.